Multiple Station Beam Refinement Protocol for Dense WLANs
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Solution Overview
Problem
In dense wireless local-area networks (WLANs), existing beamform training methods are inefficient as they require multiple connections between each station and the access point, leading to increased complexity and resource utilization, especially in multi-user multiple-input multiple-output (MU-MIMO) environments.
Innovation Solution
A multiple station beam refinement protocol (MSBRP) is introduced, which initiates with a trigger frame and separates the beam refinement process into a multi-station phase and per-station phases, allowing concurrent training among multiple stations and reducing the number of transmissions needed for beamform training.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing beamform training methods are used in dense WLANs, then beamforming training can be performed, but the number of connections and transmissions increases significantly leading to inefficiency and high complexity
Solution Approach 1:
The patent merges multiple beamforming training operations into a single multiple station beam refinement protocol (MSBRP) framework. Instead of establishing separate connections for each station to perform individual beamforming training with the access point, multiple stations participate concurrently in a unified training sequence initiated by a single trigger frame from the access point, thereby reducing the total number of connections and transmissions required
Solution Approach 2:
The MSBRP framework serves as a universal protocol that handles beamforming training for multiple stations simultaneously. The protocol structure allows the access point to coordinate and manage beamforming refinement across multiple stations through a standardized sequence of frames (trigger frame, SSW frames, BRP feedback frames), eliminating the need for separate dedicated training procedures for each station
2Reliability
If existing beamform training methods are used in dense WLANs, then beamforming training can be completed, but resource utilization deteriorates due to increased overhead
Solution Approach 1:
The patent combines multiple individual beamforming training transactions into a single consolidated MSBRP execution. By merging the training operations of multiple stations into one protocol instance with shared initialization and coordination overhead, the total resource consumption is reduced compared to executing separate training sequences for each station
Solution Approach 2:
The access point performs preliminary actions by sending a single trigger frame that initiates the entire MSBRP sequence for multiple stations. This preliminary initialization establishes the training parameters and coordinates the subsequent SSW frame exchanges, eliminating the need for repeated setup and coordination overhead for each individual station's training
3Adaptability or versatility
If multiple connections are established for beamforming training in MU-MIMO environments, then training can be performed for each station, but the complexity and overhead increase significantly
Solution Approach 1:
The MSBRP framework is designed as a universal protocol that natively supports MU-MIMO environments by accommodating multiple stations with different capabilities. The protocol handles various station configurations (different numbers of antennas, different beamforming capabilities) within a single standardized sequence, maintaining adaptability while avoiding the complexity of separate specialized procedures for each station type
Solution Approach 2:
The patent merges the coordination and management of multiple MU-MIMO station trainings into a single protocol execution. The access point manages beamforming refinement for multiple stations concurrently through unified frame exchanges, reducing the protocol complexity that would otherwise result from establishing and managing multiple separate connection-based training procedures
Data Source
AI summary
New wireless networks can perform enhanced beamforming training for a multiple access technique, such as orthogonal frequency division multiple-access (OFDMA). The configurations of the stations and the networks presented herein provide a multiple-station beam refinement protocol (MSBRP) that may be used to train the transmit end and/or the receive end for the stations in a dense wireless local area network (WLAN). The MSBRP can have at least two phases. The first phase concurrently trains the receive side of multiple responder stations from one set of training signals sent from an initiator station. Then, each responder station can send training signals to the initiator station in a set of ordered phases associated with each responder station. The MSBRP eliminates inefficiencies associated with conducting multiple BRPs that include only pairs of stations.